Feist's "1234" is "about lost love, and the hope to recapture what you once had," but it's best known for the Sesame Street version about counting to four.
Lil Wayne does an unlikely rap in a remix of the Joe Jonas song "Just In Love." The pair met at the 2008 MTV Video Music Awards.
Freddie Mercury considered "We Are The Champions" his version of "My Way." "We have made it, and it certainly wasn't easy," he said.
Marilyn Monroe is the subject of Elton John's "Candle In The Wind," but the song is really a look at how we react to celebrities who die young.
Good Charlotte's video for "Last Night" reconstructs the TV show "Family Double Dare," complete with host Marc Summers.
The chorus in "September" by Earth, Wind & Fire is "Bada-Ya, dancing in September." Group leader Maurice White left it "Bada-Ya" instead of a real word because he never let a lyric get in the way of a groove.
Lita talks about how they wrote songs in The Runaways, and how she feels about her biggest hit being written by somebody else.
Long before Eminem, Justin Bieber and Nicki Minaj created alternate personas, David Bowie, Bono, Joni Mitchell and even Hank Williams took on characters.
The guy who brought us "Stacy's Mom" also wrote the Jane Lynch Emmy song and Stephen Colbert's Christmas songs.
"Missing You" was a spontaneous outpouring of emotion triggered by a phone call. John tells that story and explains what MTV meant to his career.
Producer Rupert Hine talks about crafting hits for Tina Turner, Howard Jones and The Fixx.
The Scorpions and UFO guitarist is also a very prolific songwriter - he explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.